given a sample with n=12 x=30.2 s=2.2: find the standardized test statistic t, and beta=.01 if null: u=29

A fast food outlet claims that the mean waiting time is less than 4.9 minutes. A random sample of 60 customers has a mean of 4.8 minutes with a standard deviation of .6 minute. If beta=.05, set up the hypothesis to be tested and test the fast food outlets claim using p-value